Shaft-clamp.



PATBNTED JUNE 23, 1903.

H. G. SWAN.

SHAFT CLAMP.

uruoumn FILED JAN. 16, 1902.

H0 MODEL WITNESSES INVENTOR 0., WASHINGTON n UNITED STATES Patented June 23, 1903.

HENRY C. SWAN, OF OSHKOSH, WISCONSIN.

SHAFT-CLAM P.

SPECIFICATION forming part of Letters Patent N 0. 731,971, dated June 23, 1903.

Application filed January 16. 1902. Serial Nn- 90,046. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY C. SWAN, of Oshkosh, Winnebago county, WVisconsin, have invented anew and useful Shaft-Clamp, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is atop plan view of my improved clamp, partly broken away; and Fig. 2 is a side elevation of the same.

My invention relates to the devices employed for clamping or securing an arm to a shaft, and more particularly to that class wherein the shaft extends through an oblong hole formed by forked arms on the lever, which arms are drawn together by a bolt or drawing device at the outer end of the arm; and its object is to provide a new arrangement of the parts whereby an efficient gripping action is obtained upon the shaft.

In the drawings, 2 represents the lever or crank arm, 3 the shaft, 4. 4 the forked portions of the lever, and 5 the drawing-bolt for drawing the arms of the forked portions toward each other. The inner faces of the forks are provided with curved portions 6 6, arranged to bear upon the outer portions of the shaft, and at the inner end of the forked recess is a dog or detent 7, having portions arranged to bite upon the shaft. I have shown this dog as loosely inserted and having its face provided with a transverse recess 8, leaving two sharp ridges 9 9 to engage the shaft; but the form of this dog portion may be changed in many ways. In securing the lever or crank arm to the shaft the dog is put in place, the arm slipped on the shaft, and

the slightly resilient arms of the forked por--' tion are drawn down by the bolt or other suitable device. As the curved inner faces of the forked arms draw toward each other, they Many variations may be made in the formand arrangement of the parts without departing from my invention.

I claim- 1. In shaft-clamps, an arm having a forked portion with inner coacting curved faces arranged to contact with the shaft on one side 1 thereof, a clamping-dog arranged to contact with the said shaft on the side opposite to that of the curved faces, and mechanism engaging the forked arms on the same side of the shaft as the curved faces and arranged to force the shaft against the dog on the other side; substantially as described.

2. In shaft-clamps, an arm having a forked portion, the forks having intermediate inner coacting wedging-faces arranged to act upon the shaft at one side thereof, a clamping-dog at the inner end of the fork arranged to engage'the side of the shaft opposite to that engaged by the wedge-faces, and a bolt extending through the outer end of the forked arms arranged to draw them together; substantially as described.

In testimony whereof I have hereunto set my hand.

.IIENRY C. SWAN.

WVitnesses: W. P. CHAMPNEY, L. CHRISTIE. 

